/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 2051 by frank, Wed Jan 21 17:09:15 2004 UTC revision 2544 by bh, Mon Jan 24 11:19:53 2005 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001, 2002, 2003 by Intevation GmbH  # Copyright (C) 2001, 2002, 2003, 2004, 2005 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 23  from wxPython.wx import * Line 23  from wxPython.wx import *
23  import Thuban  import Thuban
24    
25  from Thuban import _  from Thuban import _
26  from Thuban.Model.messages import TITLE_CHANGED  from Thuban.Model.messages import TITLE_CHANGED, LAYER_PROJECTION_CHANGED, \
27         MAP_PROJECTION_CHANGED, MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED
28    
29  from Thuban.Model.session import create_empty_session  from Thuban.Model.session import create_empty_session
30  from Thuban.Model.layer import Layer, RasterLayer  from Thuban.Model.layer import Layer, RasterLayer
31  from Thuban.Model.postgisdb import PostGISShapeStore, has_postgis_support  from Thuban.Model.postgisdb import PostGISShapeStore, has_postgis_support
# Line 35  from Thuban.UI.multiplechoicedialog impo Line 37  from Thuban.UI.multiplechoicedialog impo
37  import view  import view
38  import tree  import tree
39  import tableview, identifyview  import tableview, identifyview
 from Thuban.UI.classifier import Classifier  
40  import legend  import legend
41  from menu import Menu  from menu import Menu
42    
# Line 53  import Thuban.Model.resource Line 54  import Thuban.Model.resource
54    
55  import projdialog  import projdialog
56    
57    from Thuban.Lib.classmapper import ClassMapper
58    
59    layer_properties_dialogs = ClassMapper()
60    
61  class MainWindow(DockFrame):  class MainWindow(DockFrame):
62    
# Line 73  class MainWindow(DockFrame): Line 77  class MainWindow(DockFrame):
77                           "SelectedShapes": "canvas",                           "SelectedShapes": "canvas",
78                           }                           }
79    
80        # Messages from the canvas that may require a status bar update.
81        # The update_status_bar method will be subscribed to these messages.
82        update_status_bar_messages = (VIEW_POSITION, LAYER_PROJECTION_CHANGED,
83                                      MAP_PROJECTION_CHANGED, MAP_LAYERS_ADDED,
84                                      MAP_LAYERS_REMOVED)
85    
86      def __init__(self, parent, ID, title, application, interactor,      def __init__(self, parent, ID, title, application, interactor,
87                   initial_message = None, size = wxSize(-1, -1)):                   initial_message = None, size = wxSize(-1, -1)):
88          DockFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)          DockFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
# Line 99  class MainWindow(DockFrame): Line 109  class MainWindow(DockFrame):
109    
110          # Create the map canvas          # Create the map canvas
111          canvas = view.MapCanvas(self, -1)          canvas = view.MapCanvas(self, -1)
         canvas.Subscribe(VIEW_POSITION, self.view_position_changed)  
112          canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)          canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)
113          self.canvas = canvas          self.canvas = canvas
114          self.canvas.Subscribe(TITLE_CHANGED, self.title_changed)          self.canvas.Subscribe(TITLE_CHANGED, self.title_changed)
115    
116            for channel in self.update_status_bar_messages:
117                self.canvas.Subscribe(channel, self.update_status_bar)
118    
119          self.SetMainWindow(self.canvas)          self.SetMainWindow(self.canvas)
120    
121          self.SetAutoLayout(True)          self.SetAutoLayout(True)
# Line 332  class MainWindow(DockFrame): Line 344  class MainWindow(DockFrame):
344      def get_open_dialog(self, name):      def get_open_dialog(self, name):
345          return self.dialogs.get(name)          return self.dialogs.get(name)
346    
347      def view_position_changed(self):      def update_status_bar(self, *args):
348            """Handler for a bunch of messages that may require a status bar update
349    
350            Currently this handles the canvas' VIEW_POSITION_CHANGED
351            messages as well as several messages about changes in the map
352            which may affect whether and how projections are used.
353    
354            These messages affect the text in the status bar in the following way:
355    
356            When VIEW_POSITION_CHANGED messages are sent and the mouse is
357            actually in the canvas window, display the current mouse
358            coordinates as defined by the canvas' CurrentPosition method.
359    
360            If there is no current position to show, check whether there is
361            a potential problem with the map and layer projections and
362            display a message about it.  Otherwise the status bar will
363            become empty.
364    
365            The text is displayed in the status bar using the
366            set_position_text method.
367            """
368            # Implementation note: We do not really have to know which
369            # message was sent.  We can simply call the canvas'
370            # CurrentPosition method and if that returns a tuple, it was a
371            # VIEW_POSITION_CHANGED message and we have to display it.
372            # Otherwise it was a VIEW_POSITION_CHANGED message where the
373            # mouse has left the canvas or it was a message about a change
374            # to the map, in which case we check the projections.
375            #
376            # When changing this method, keep in mind that the
377            # VIEW_POSITION_CHANGED message are sent for every mouse move in
378            # the canvas window, that is they happen very often, so the path
379            # taken in that case has to be fast.
380            text = ""
381          pos = self.canvas.CurrentPosition()          pos = self.canvas.CurrentPosition()
382          if pos is not None:          if pos is not None:
383              text = "(%10.10g, %10.10g)" % pos              text = "(%10.10g, %10.10g)" % pos
384          else:          else:
385              text = ""              for layer in self.canvas.Map().Layers():
386                    bbox = layer.LatLongBoundingBox()
387                    if bbox:
388                        left, bottom, right, top = bbox
389                        if not (-180 <= left <= 180 and
390                                -180 <= right <= 180 and
391                                -90 <= top <= 90 and
392                                -90 <= bottom <= 90):
393                            text = _("Select layer '%s' and pick a projection "
394                                     "using Layer/Projection...") % layer.title
395                            break
396    
397          self.set_position_text(text)          self.set_position_text(text)
398    
399      def set_position_text(self, text):      def set_position_text(self, text):
400          """Set the statusbar text showing the current position.          """Set the statusbar text to that created by update_status_bar
401    
402          By default the text is shown in field 0 of the status bar.          By default the text is shown in field 0 of the status bar.
403          Override this method in derived classes to put it into a          Override this method in derived classes to put it into a
404          different field of the statusbar.          different field of the statusbar.
405    
406            For historical reasons this method is called set_position_text
407            because at first the text was always either the current position
408            or the empty string.  Now it can contain other messages as well.
409            The method will be renamed at one point.
410          """          """
411            # Note: If this method is renamed we should perhaps think about
412            # some backwards compatibility measures for projects like
413            # GREAT-ER which override this method.
414          self.SetStatusText(text)          self.SetStatusText(text)
415    
416        def OpenOrRaiseDialog(self, name, dialog_class, *args, **kw):
417            """
418            Open or raise a dialog.
419    
420            If a dialog with the denoted name does already exist it is
421            raised.  Otherwise a new dialog, an instance of dialog_class,
422            is created, inserted into the main list and displayed.
423            """
424            dialog = self.get_open_dialog(name)
425    
426            if dialog is None:
427                dialog = dialog_class(self, name, *args, **kw)
428                self.add_dialog(name, dialog)
429                dialog.Show(True)
430            else:
431                dialog.Raise()
432                              
433      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
434          """If the current session has been modified, ask the user          """If the current session has been modified, ask the user
435          whether to save it and do so if requested. Return the outcome of          whether to save it and do so if requested. Return the outcome of
# Line 421  class MainWindow(DockFrame): Line 502  class MainWindow(DockFrame):
502              # FIXME: it would be better to tie the unsubscription to              # FIXME: it would be better to tie the unsubscription to
503              # wx's destroy event, but that isn't implemented for wxGTK              # wx's destroy event, but that isn't implemented for wxGTK
504              # yet.              # yet.
505              self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)              for channel in self.update_status_bar_messages:
506                    self.canvas.Unsubscribe(channel, self.update_status_bar)
507    
508              DockFrame.OnClose(self, event)              DockFrame.OnClose(self, event)
509              for dlg in self.dialogs.values():              for dlg in self.dialogs.values():
510                  dlg.Destroy()                  dlg.Destroy()
# Line 529  class MainWindow(DockFrame): Line 612  class MainWindow(DockFrame):
612          dlg = ChooseDBTableDialog(self, self.application.Session())          dlg = ChooseDBTableDialog(self, self.application.Session())
613    
614          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
615              dbconn, dbtable = dlg.GetTable()              dbconn, dbtable, id_column, geo_column = dlg.GetTable()
616              try:              try:
617                  title = str(dbtable)                  title = str(dbtable)
618    
619                  # Chose the correct Interface for the database type                  # Chose the correct Interface for the database type
620                  store = PostGISShapeStore(dbconn, dbtable)                  store = session.OpenDBShapeStore(dbconn, dbtable,
621                  session.AddShapeStore(store)                                                   id_column = id_column,
622                                                     geometry_column = geo_column)
623                  layer = Layer(title, store)                  layer = Layer(title, store)
624              except:              except:
625                  # Some error occured while initializing the layer                  # Some error occured while initializing the layer
626                  self.RunMessageBox(_("Add Layer from database"),                  self.RunMessageBox(_("Add Layer from database"),
627                                     _("Can't open the database table '%s'")                                     _("Can't open the database table '%s'")
628                                     % dbtable)                                     % dbtable)
629                    return
630    
631              map = self.canvas.Map()              map = self.canvas.Map()
632    
# Line 570  class MainWindow(DockFrame): Line 655  class MainWindow(DockFrame):
655              return self.canvas.Map().CanRemoveLayer(layer)              return self.canvas.Map().CanRemoveLayer(layer)
656          return False          return False
657    
658        def LayerToTop(self):
659            layer = self.current_layer()
660            if layer is not None:
661                self.canvas.Map().MoveLayerToTop(layer)
662    
663      def RaiseLayer(self):      def RaiseLayer(self):
664          layer = self.current_layer()          layer = self.current_layer()
665          if layer is not None:          if layer is not None:
# Line 580  class MainWindow(DockFrame): Line 670  class MainWindow(DockFrame):
670          if layer is not None:          if layer is not None:
671              self.canvas.Map().LowerLayer(layer)              self.canvas.Map().LowerLayer(layer)
672    
673        def LayerToBottom(self):
674            layer = self.current_layer()
675            if layer is not None:
676                self.canvas.Map().MoveLayerToBottom(layer)
677    
678      def current_layer(self):      def current_layer(self):
679          """Return the currently selected layer.          """Return the currently selected layer.
680    
# Line 602  class MainWindow(DockFrame): Line 697  class MainWindow(DockFrame):
697      def HideLayer(self):      def HideLayer(self):
698          layer = self.current_layer()          layer = self.current_layer()
699          if layer is not None:          if layer is not None:
700              layer.SetVisible(0)              layer.SetVisible(False)
701    
702      def ShowLayer(self):      def ShowLayer(self):
703          layer = self.current_layer()          layer = self.current_layer()
704          if layer is not None:          if layer is not None:
705              layer.SetVisible(1)              layer.SetVisible(True)
706    
707        def ToggleLayerVisibility(self):
708            layer = self.current_layer()
709            layer.SetVisible(not layer.Visible())
710    
711      def DuplicateLayer(self):      def DuplicateLayer(self):
712          """Ceate a new layer above the selected layer with the same shapestore          """Ceate a new layer above the selected layer with the same shapestore
# Line 618  class MainWindow(DockFrame): Line 717  class MainWindow(DockFrame):
717                                layer.ShapeStore(),                                layer.ShapeStore(),
718                                projection = layer.GetProjection())                                projection = layer.GetProjection())
719              new_classification = copy.deepcopy(layer.GetClassification())              new_classification = copy.deepcopy(layer.GetClassification())
720                new_layer.SetClassificationColumn(
721                        layer.GetClassificationColumn())
722              new_layer.SetClassification(new_classification)              new_layer.SetClassification(new_classification)
723              self.Map().AddLayer(new_layer)              self.Map().AddLayer(new_layer)
724    
# Line 627  class MainWindow(DockFrame): Line 728  class MainWindow(DockFrame):
728          return layer is not None and hasattr(layer, "ShapeStore")          return layer is not None and hasattr(layer, "ShapeStore")
729    
730      def LayerShowTable(self):      def LayerShowTable(self):
731            """
732            Present a TableView Window for the current layer.
733            In case the window is already open, bring it to the front.
734            In case, there is no active layer, do nothing.
735            In case, the layer has no ShapeStore, do nothing.
736            """
737          layer = self.current_layer()          layer = self.current_layer()
738          if layer is not None:          if layer is not None:
739                if not hasattr(layer, "ShapeStore"):
740                    return
741              table = layer.ShapeStore().Table()              table = layer.ShapeStore().Table()
742              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
743              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
# Line 639  class MainWindow(DockFrame): Line 748  class MainWindow(DockFrame):
748                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
749                  dialog.Show(True)                  dialog.Show(True)
750              else:              else:
751                  # FIXME: bring dialog to front here                  dialog.Raise()
                 pass  
752    
753      def MapProjection(self):      def MapProjection(self):
754    
# Line 682  class MainWindow(DockFrame): Line 790  class MainWindow(DockFrame):
790          self.OpenLayerProperties(layer)          self.OpenLayerProperties(layer)
791    
792      def OpenLayerProperties(self, layer, group = None):      def OpenLayerProperties(self, layer, group = None):
793          name = "layer_properties" + str(id(layer))          """
794          dialog = self.get_open_dialog(name)          Open or raise the properties dialog.
795    
796          if dialog is None:          This method opens or raises the properties dialog for the
797              dialog = Classifier(self, name, self.Map(), layer, group)          currently selected layer if one is defined for this layer
798              self.add_dialog(name, dialog)          type.
799              dialog.Show()          """
800          dialog.Raise()          dialog_class = layer_properties_dialogs.get(layer)
801    
802            if dialog_class is not None:
803                name = "layer_properties" + str(id(layer))
804                self.OpenOrRaiseDialog(name, dialog_class, layer, group = group)
805    
806      def LayerJoinTable(self):      def LayerJoinTable(self):
807          layer = self.canvas.SelectedLayer()          layer = self.canvas.SelectedLayer()
# Line 985  def _has_selected_layer(context): Line 1097  def _has_selected_layer(context):
1097      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
1098      return context.mainwindow.has_selected_layer()      return context.mainwindow.has_selected_layer()
1099    
1100    def _has_selected_layer_visible(context):
1101        """Return true if a layer is selected in the context which is
1102        visible."""
1103        if context.mainwindow.has_selected_layer():
1104            layer = context.mainwindow.current_layer()
1105            if layer.Visible(): return True
1106        return False
1107    
1108  def _has_selected_shape_layer(context):  def _has_selected_shape_layer(context):
1109      """Return true if a shape layer is selected in the context"""      """Return true if a shape layer is selected in the context"""
1110      return context.mainwindow.has_selected_shape_layer()      return context.mainwindow.has_selected_shape_layer()
# Line 1008  def _has_visible_map(context): Line 1128  def _has_visible_map(context):
1128      if map is not None:      if map is not None:
1129          for layer in map.Layers():          for layer in map.Layers():
1130              if layer.Visible():              if layer.Visible():
1131                  return 1                  return True
1132      return 0      return False
1133    
1134  def _has_legend_shown(context):  def _has_legend_shown(context):
1135      """Return true if the legend window is shown"""      """Return true if the legend window is shown"""
# Line 1133  _method_command("layer_jointable", _("&J Line 1253  _method_command("layer_jointable", _("&J
1253                  sensitive = _has_selected_shape_layer,                  sensitive = _has_selected_shape_layer,
1254                  helptext = _("Join and attach a table to the selected layer"))                  helptext = _("Join and attach a table to the selected layer"))
1255    
1256    # further layer methods:
1257    _method_command("layer_to_top", _("&Top"), "LayerToTop",
1258                    helptext = _("Put selected layer to the top"),
1259                    sensitive = _has_selected_layer)
1260    _method_command("layer_to_bottom", _("&Bottom"), "LayerToBottom",
1261                    helptext = _("Put selected layer to the bottom"),
1262                    sensitive = _has_selected_layer)
1263    _method_command("layer_visibility", _("&Visible"), "ToggleLayerVisibility",
1264                    checked = _has_selected_layer_visible,
1265                    helptext = _("Toggle visibility of selected layer"),
1266                    sensitive = _has_selected_layer)
1267    
1268  def _can_unjoin(context):  def _can_unjoin(context):
1269      """Return whether the Layer/Unjoin command can be executed.      """Return whether the Layer/Unjoin command can be executed.
1270    
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